Extension-table.



E. L. 'MARSTON EXTENSION TABLE.

.9 1 om, 2 Lb. ,mur S d f @wenn 4 HTP \\\q\\\ v wf/// a EDGAR L. MARSTON, 0F SOMERVILL, MASSACHUSETTS,

ASSIGNOR TO CHARLES J.

BROWN, OF NEWTON, MASSACHUSETTS.

EXTENSION-TABLE.

To all whom it may concern:

Be it known that I, EDGAR L. MARsroN, of Somerville, in the county of Middlesex and State' of Massachusetts, have invented certainnew and useful Improvements in Extension-Tables, of which the following isa of detachable leaves between them.

The invention has for its object to provide simple and effective means for connecting and drawing closely together the meeting edges of the permanent top sections without Vinterfering with the separation of the top sections to any extent desired for the interposition of intermediate leaves.

"The invention consists in the improvemeiitsivliich I will now proceed to desciibe and claim.

Of the accompanying drawings, forming a part of this specification, Figure 1 represents a longitudinal section" 'showing one ot' the permanent topl sections and a part of the other permanent top section of an extension'table, and portions of the pedestal secwtins which support the top, mechanism for coupling the top sections together in accordance with my invention `being ,also shown.

Fig.72 represents a top plan view, showing portions of the top sections represented in F ig. 1 ,`with portions broken away, showing a plan View partially in section of the coupling mechanism illustrated in Fig. 1, the

`top sections being drawn together by the coupling mechanism. 'Fig. 3 represents a view similar to Fig. 2, showing the top sections slightly -separated and ready to be drawn together by the coupling mechanism.

The same reference characters indicate the same parts in all ythe figures.

In the drawings,-'12 and 18 represent the permanent top sections of an extension table, said sections being separable from each other to permit the extension of the table top bythe inter-position of leaves between the sections, suitable means -being provided for supporting the top sections and intermediate leaves interposed between the latter when theyjare separated. l

In the embodiment of the'invention here Specification of Letters Patent.

Patented sept; 2s, 1909.

Application filed May 5, 1909. Serial No. 494,199.

shown, the table top is supported by separable pedestal sections 14, 15, which are movable with the top sections to extend and contract the table, the .top sections being also movable independently ofthe pedestal sections, if desired, so that the top may be extended to a limited extent by the interposition of a relatively small number of leaves between them without separation of the pedestal sections.

In carrying out my invention, I provide the top sections 12 and 13 with coupling members, one of which is rigidly atiixed to the section 12, while the other has a compound movement on the section 13, the lat-l ter being provided with means so organized that when the top sections are slightly separated, the movable coupling member will be first swung into alinement with .the fixed member, and will then have a rectilinear movement causing it to engage the tixed member and draw the top sections tirmlytogether.

The fixedl coupling member is here shown as a loop 16 rigidly attached to the under side of the section'12, one end of said loopl forming a guide and an abutment for the movable member 17. is here shown as having the form of a bellcrank lever, one arm of which has a longitudinal slot 18througli which passes a stud 19 aiiixed to the top section 13, the outer end of said arm having a hook 20 adapted to engage the abut-nient end of the rigid meinber 16.

21 represents an operating lever pivoted at 22 to an eai 23 aiiixed to the section 13.

.24 represents a. connectingrod pivoted at 25 to the lever 21, and at 26 to the shorter bell-crank arm of the movable member 17, the said connecting 4rod being preferably lprovided with a bifurcated terminal inember, the neck portion of which is adjustably engaged with a screw `threaded portion 28 of the connecting rod, the arms of; said terminal member bearing on oppositesides of the lever 21, and being connected therewith by the pivot 25 which is preferably a Cotter pin.

29 represents a guide for the connecting rod 24, said guide being attached to thc scction 13, and arranged to prevent the rod 24 vfrom swinging horizontally.

When the top sections 12 and 13 arated by a re sepa space sufiiclent to permit the iu- Said movable member moving and guiding the movable member 17 is such that when the lever 21 `is depressed, as lindicated by dotted lines in Fig. 1, the movable member 17 which extendsacross the crevice between the top sections, stands with its hook 20 out of alineinent with the abutment on the rigid member 1G. A movement of the lever 21 from tlie dotted line to the full lineposition, shown in Fig; 1, causes the movable member to swing in the direction of the arrow in Fig. 3, thus moving the hook into the rigid member 16, and causing one edge of the movable member to bear against the rigid member, which is thus caused to act as a guide for the movable member.

This takes place before the `completion of thel 'upward movement of the lever 21. the pivotal movement of hook 17 is limited After bythe rigid member 16 the completion of the movement of lever 21 causes said member 17 to move in a rectilinear direction against the abutment provided by the rigid member 16, this lrectilinear movement causing the inner ends of the top sections 12 and 13 ,to come to a close bearing on each other,

, as shown in Figs. 'l and 2.

When the lever 21is moved from the full line to the dotted line position shown in Fig. 1, the movable member 17 is first moved in a rectilinear direction away from its abutment on the rigid member 16 until the stud 19 bears on the inner end ofthe Aslot 1 8,- the completion of the downward movement of the lever 21 then causing the movable meniber 17 to swing out of alinement with the rigid member 16, as indicated in Fig. 3. It will be seen that the guide 29, by preventing the horizontal movement of the rod 24, insures a rectilinear movement of the movable member 17 until the stud 19 comes to a bearing on the inner end ofthe slot 18, after which a swinging outward movement is .im arted to the member 17, the stud 19 and s ot 18 also coperating in causing a rectilinear movement of the member 17 .in both directions.

The connecting rod 24 is rovided with an undulating portion30 whic acts asa spring permitting a sufficient extension of the rod` l to prevent undue strain on therod and the parts connected therewith after the inner ends of the sections 12 and 13 have come to a close bearing on each other.`

1; An extension table comprising sepa; ,rable top sections, a rigid coupling member carried by one of said sections, a bell crank lever constructed to engage said rigid coup# ling member and'provided with a slot, a pivot stud carried by the other top section and engaging the slot of said bell crank le: ver, means secured to one end of said lever for swinging the same on said stud, said rigid coupling member being arranged to interrupt the swinging movement of said pivoted coupling member and to impart a rectilinear movement to the latter during a means.'

2. An extension i rable top sections, a pivot stud carried by one slot in one arm thereof to receive said pivot stud, said arm being provided with a hook, an operating rod engaging the other arm of said bell crank lever, meansior moving said rod longitudinally, and a rigid coupling member attached to the other section and arranged to interrupt the swinging movement of said bell cranklever and to impart a rectilinear movement to the latter during a portionof the movement of said rod.

An extension table comprising sepaof said sections, a bell crank'lever having a slot in one arm thereofl to receive said pivot stud, said arm being-,provided with a hook, an operating rod engaging the other arm of said bell crank lever, means for moving said rod longitudinally, means for preventin lateral movement of said rod, and arrigi coupling member attached to the other section and arranged to interrupt the swinging movement'of said bell crank lever and to impart a rectilinear movement tothe latter duingk a `portion of the movement of said roc 4. An extension table comprisin separable top sections, a pivot stud carried by one ofsaid sections, a bell crank lever havin'g a stud, said arm being provided with a hook, anoperating rod engaging the other arm of said bell crank lever, an operating lever ful- `crumed to said sect-ion and pivoted to the connecting rod at a distance from said fulcrurn, means for preventing horizontal lateral movement of said rod, and a rigid coupling member attached to the other section and arranged to interrupt the 'swinging movementof said bell crank' lever and to im-V part a rectilinear movement tol the latter rod.

5. An extension table comprisin separable top sections, a pivot stud carrie by one slot in one arm thereof to receive said pivot studisaid arm being provided with a hook,

portion of the movement pf said-operating table comprising sepa-l of said sections, a bell crank lever having aV rable top sections, a pivot stud carried by one slot in onearm thereof to receive said pivot during a portion of the movement of said 'i of said sections, a bell crank lever having a 'iso an operating roel engaging tlie'etlier arm of andl to impart a rectilinear movement to the '1o said bell crank lever, said rod being provided letter during a portion of the movement of with a resilient portion constructed to yield said rod.

under excessive pulling strain, means for In testimony whereof I'have axed my moving said rod longitudinally, means for signature, in' presence of two Witnesses. preventing lateral movement of said rod, EDGAR' L. MARSTON and a rigid coupling member att-ached to the Witnesses: l v other section and arranged to interrupt-the CHARLES J. BROWN,

swinging' movement of said bell crank lever PETER N. PEZZETTI. 

